[turba] Notice: Undefined offset: 1

[Terence]

Can somebody help me with the following please? Each time I try to access
the addressbook I get this. I am in the midst of setting up
Turba 1.2 with IMP 3.2.1 and Horde 2.2.1 on Redhat 8.

Notice: Undefined offset: 1 in /var/www/html/horde/turba/config/sources.php
on line 107

Warning: Cannot add header information - headers already sent by (output
started at /var/www/html/horde/turba/config/sources.php:107) in
/var/www/html/horde/turba/index.php on line 28

Thanks
Terence